EP1142970A1 - Ink for applying a decoration on a molded article simultaneously with molding, and decorated film or sheet - Google Patents
Ink for applying a decoration on a molded article simultaneously with molding, and decorated film or sheet Download PDFInfo
- Publication number
- EP1142970A1 EP1142970A1 EP01107761A EP01107761A EP1142970A1 EP 1142970 A1 EP1142970 A1 EP 1142970A1 EP 01107761 A EP01107761 A EP 01107761A EP 01107761 A EP01107761 A EP 01107761A EP 1142970 A1 EP1142970 A1 EP 1142970A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- synthetic resin
- ink
- sheet
- decoration
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
- Y10T428/24909—Free metal or mineral containing
Definitions
- the present invention relates generally to an ink used for applying a decoration on a molded article upon injection molding or the like, and more particularly to a metal powder-containing ink.
- This method enables the pattern to be formed on a molded article configured such that difficulty is involved in forming a pattern directly on its surface by means of printing.
- the method have also additional advantages of having higher adhesion strength than could be achieved by printing on the surface of the molded article and being unlikely to deteriorate with the lapse of years, and so is used for the decorations of the surfaces of various devices inclusive of electronic devices of small size such as portable telephones, and personal computers.
- the decorated sheet with a decoration already printed thereon is first placed in the mold, and a molding synthetic resin melt is then injected into the mold. Since the melt having a temperature of 200°C to 300°C is injected under high pressure into the mold, however, there are several problems such as a flow of the pattern printed on the decorated sheet, and deformation of the decorated sheet. These problems result in molded article products that are poor in quality or of no commercial value. In some case, the adhesion strength of the decorated sheet to the molded synthetic resin becomes insufficient due to the rolling of the decoration.
- the metal particles such as aluminum particles are widely used for the purpose of adding a metallic luster and a high degree of concealing effect to molded articles, and so a grave problem arises in association with a decorated film or sheet with a decoration printed thereon by a printing ink containing metal particles such as aluminum particles.
- An object of the present invention is to provide a printing ink containing metal particles, which can prevent any flow of a pattern printed on a decorated film or sheet that is placed in a mold for injection molding while it is integrated with synthetic resin, thereby foreclosing the possibility of yielding defectives on injection molding.
- Fig. 1 is a plan representation of an injection molded sample prepared in the example according to the present invention.
- the aforesaid object is achievable by the provision of AN ink used for printing of a preprinted film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, comprising:
- the metal particle is a flat form of aluminum particle, which may have, or may have not, been coated on its surface with an acrylic resin.
- the present invention also provides a printed film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, which has been obtained by printing a synthetic resin film with an ink comprising a binder comprising a polycarbonate resin and a metal particle coated on the surface thereof with a coupling agent or a synthetic resin.
- the present invention provides a synthetic resin injection molding method wherein a printed film or sheet is prepared by printing using an ink containing a metal particle coated on the surface thereof with a coupling agent or a synthetic resin, the printed film or sheet is then placed in a metal mold, and a synthetic resin melt is finally subjected to injection molding at a temperature of 200°C or higher.
- flat fine particles such as scaly ones are used for the purposes of achieving an enhanced concealing effect and obtaining a metallic luster.
- the present invention takes chief aim at preventing any flowing of the decoration or the like by previously coating the surfaces of these fine metal particles with a coupling agent or a synthetic resin.
- polycarbonate resins of high heat resistance For the binder used with the picture applying ink according to the present invention, it is preferable to use polycarbonate resins of high heat resistance. For instance, it is acceptable to make use of generally known polycarbonate resins as well as aromatic polycarbonate resins modified by copolymers comprising 2,2-bis(4-hydroxyphenyl)propane units and 2,2-bis(4-hydroxy-3-methylphenyl)propane units or dialkylsiloxane units.
- Yupiron FPC 2136 (copoly(2,2-bis(4-hydroxyphenyl)propane/2,2-bis(4-hydroxy-3-methylphenyl) propane) carbonate made by Mitsubishi Gas Chemical Company, Inc.), Z200 made by the same company, Panlight TS-2020 made by Teijin Limited, and high-heat-resistant thermoplastic resins set forth in Patent No. 2997636 are usable.
- the ink of the present invention may be produced by mixing these components with pigments and components generally added to inks, and milling the resultant mixture with the addition of an organic solvent thereto.
- the ink of the present invention is produced by mixing the components together.
- the present ink may be produced by adding the metal particles treated with the synthetic resin or coupling agent to heat-resistant ink compositions commercially available for the formation of decorated sheets.
- NORIPHAN HTR Proell Co., Ltd.
- the decorated film or sheet produced by use of the ink according to the present invention may be formed by printing a given pattern on a substrate film such as a polycarbonate film by means of suitable processes such as screen printing.
- polycarbonate resins for the synthetic resin to be integrated with the decorated sheet of the present invention, it is acceptable to use polycarbonate resins, acrylonitrile ⁇ butadiene ⁇ styrene copolymers, and polymer alloys comprising polycarbonate resins/acrylonitrile ⁇ butadiene ⁇ styrene copolymers.
- a polycarbonate resin (Yuprion FPC2136 made by Mitsubishi Gas Chemical Company, Inc.), 20 parts by weight of a paste of aluminum particles coated with a synthetic resin (FZ-7160N made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 13 ⁇ m), 1 part by weight of an anti-foaming agent (BYK-057 made by BYK-Chemie Japan Co., Ltd.), 20 parts by weight of a cyclohexanone solvent, 20 parts by weight of a propylene glycol monomethyl ether acetate solvent and 20 parts by weight of a Solvesso #150 solvent were mixed together, and the resultant mixture was then milled by a rotary mixer into an ink 1.
- a polycarbonate resin Yuprion FPC2136 made by Mitsubishi Gas Chemical Company, Inc.
- a paste of aluminum particles coated with a synthetic resin FZ-7160N made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 13 ⁇ m
- a filled-in form of print pattern was formed by screen printing on a polycarbonate resin film of 150 mm x 70 mm in size and 500 ⁇ m in thickness.
- the printed film was dried at 100°C for 2 hours to prepare a decorated sheet.
- the resultant decorated sheet was placed in a mold for injection molding.
- a polymer alloy (Yupiron PM1210N made by Mitsubishi Gas Chemical Company, Inc.) comprising a polycarbonate/acrylonitrile ⁇ butadiene ⁇ styrene copolymer was fed from an injection molding machine with a cylinder temperature set at 250°C into the mold at 116 cm 3 /sec. to prepare an injection molded sample of 1.5 mm in thickness.
- the decorated sheet side of the injection molded sample was provided with an incision of 1 cm in width, at which the decorated sheet was peeled from the injection molded resin at a rate of pulling of 300 mm/min. to measure a 180° peel strength using a tensile tester.
- the picture rolling amount was measured as in Example 1A with the exception that a polycarbonate resin (Yupiron S-3000 made by Mitsubishi Gas Chemical Company, Inc.) for injection molding was fed at 116 cm 3 /sec. with a cylinder temperature of 305°C to prepare an injection molded sample of 1.9 mm in thickness.
- a polycarbonate resin Yupiron S-3000 made by Mitsubishi Gas Chemical Company, Inc.
- the thus measured decoration flowing amount and peel strength are shown in Table 2.
- An ink 2 was prepared as in Example 1A with the exception that a paste of synthetic resin-coated aluminum particles (FZ-Q65 made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 20 ⁇ m) was used as the aluminum particles.
- a paste of synthetic resin-coated aluminum particles FZ-Q65 made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 20 ⁇ m
- Example 1A Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Example 2 Injection molding was carried out following Example 1B with the exception that ink 2 was used to prepare an injection molded sample. Then, the decoration flowing amount and peel strength were measured with the results shown in Table 2.
- An ink 3 was prepared as in Example 1A with the exception that a paste of aluminum particles surface-treated with a coupling agent (97-2515 made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 9 ⁇ m) was used as the aluminum particles.
- a coupling agent 9-2515 made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 9 ⁇ m
- Example 1A Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Example 2 Injection molding was carried out following Example 1B with the exception that ink 3 was used to prepare an injection molded sample. Then, the decoration flowing amount and peel strength were measured with the results shown in Table 2.
- An ink 4 was prepared as in Example 1A with the exception that aluminum particles subjected to no surface treatment (TD280T made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 20 ⁇ m) was used as the aluminum particles.
- TD280T made by Toyo Aluminum Co., Ltd. with a particle diameter D 50 of 20 ⁇ m
- Example 1A Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Molded articles obtained while the decorated film or sheet prepared using the ink of the present invention was placed in a mold for injection molding can be reduced in terms of the decoration flowing amount due to a flow of the synthetic resin during injection.
- the present invention enables molded article products to be produced in improved yields.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Laminated Bodies (AREA)
Abstract
Description
- The present invention relates generally to an ink used for applying a decoration on a molded article upon injection molding or the like, and more particularly to a metal powder-containing ink.
- For the decoration of the surface of a molded article of synthetic resin, there is known a method wherein the synthetic resin is injected into a mold cavity provided with a film or sheet having a decoration pre-printed thereon by an ink to integrate the pattern printed on the decorated sheet into the synthetic resin.
- This method enables the pattern to be formed on a molded article configured such that difficulty is involved in forming a pattern directly on its surface by means of printing. The method have also additional advantages of having higher adhesion strength than could be achieved by printing on the surface of the molded article and being unlikely to deteriorate with the lapse of years, and so is used for the decorations of the surfaces of various devices inclusive of electronic devices of small size such as portable telephones, and personal computers.
- In an injection molding process, the decorated sheet with a decoration already printed thereon is first placed in the mold, and a molding synthetic resin melt is then injected into the mold. Since the melt having a temperature of 200°C to 300°C is injected under high pressure into the mold, however, there are several problems such as a flow of the pattern printed on the decorated sheet, and deformation of the decorated sheet. These problems result in molded article products that are poor in quality or of no commercial value. In some case, the adhesion strength of the decorated sheet to the molded synthetic resin becomes insufficient due to the rolling of the decoration.
- To solve such problems, it has been proposed to change the position of a gate of the mold used for injection molding or vary the spacing between the gate and the decorated film or sheet. However, these proposals are found to have another problem that the amount of material wastefully consumed during molding increases.
- It has also been proposed to make use of an ink having the nature of extending following the deformation of the decorated film or sheet, which occurs while the synthetic resin melt flows. For this ink, a two-part type of printing ink for intermolecular crosslinking is used, and for a printing ink of high heat resistance, a printing ink containing a thermoplastic aromatic polycarbonate has already been proposed in Patent No. 2997636.
- However, even these printing inks are found to flow in severe injection molding conditions such as high injection speeds of synthetic resin melts.
- This printing ink flow problem becomes noticeable in the case of a printing ink containing metal particles such as aluminum particles.
- The metal particles such as aluminum particles are widely used for the purpose of adding a metallic luster and a high degree of concealing effect to molded articles, and so a grave problem arises in association with a decorated film or sheet with a decoration printed thereon by a printing ink containing metal particles such as aluminum particles.
- An object of the present invention is to provide a printing ink containing metal particles, which can prevent any flow of a pattern printed on a decorated film or sheet that is placed in a mold for injection molding while it is integrated with synthetic resin, thereby foreclosing the possibility of yielding defectives on injection molding.
- Fig. 1 is a plan representation of an injection molded sample prepared in the example according to the present invention.
- According to the present invention, the aforesaid object is achievable by the provision of AN ink used for printing of a preprinted film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, comprising:
- a binder comprising a polycarbonate resin, and
- a metal particle coated on the surface thereof with a coupling agent or a synthetic resin.
-
- Preferably in this aspect of the present invention, the metal particle is a flat form of aluminum particle, which may have, or may have not, been coated on its surface with an acrylic resin.
- The present invention also provides a printed film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, which has been obtained by printing a synthetic resin film with an ink comprising a binder comprising a polycarbonate resin and a metal particle coated on the surface thereof with a coupling agent or a synthetic resin.
- Further, the present invention provides a synthetic resin injection molding method wherein a printed film or sheet is prepared by printing using an ink containing a metal particle coated on the surface thereof with a coupling agent or a synthetic resin, the printed film or sheet is then placed in a metal mold, and a synthetic resin melt is finally subjected to injection molding at a temperature of 200°C or higher.
- According to the present invention, it has now been found that when injection molding is carried out while a sheet with a decoration printed thereon using a ink containing fine metal particles, e.g., a so-called silver ink, is placed in a mold, any flowing of the decorative image applied on the printed film or sheet is prevented by using metal particles coated on their surfaces with a coupling agent or a synthetic resin as the fine metal particles while the image is not adversely affected by a resin melt injected into the mold.
- In consideration of the facts that the flowing of the decoration during injection molding does not only relate to the heat resistance, etc. of a binder contained in the ink but also depends largely on fine metal particles contained in the ink such as the silver ink, the inventors have found that problems such as a decoration flowing problem can be substantially solved by using metal particles treated on their surfaces with a synthetic resin, etc.
- For the fine metal particles to be added to inks, flat fine particles such as scaly ones are used for the purposes of achieving an enhanced concealing effect and obtaining a metallic luster. The present invention takes chief aim at preventing any flowing of the decoration or the like by previously coating the surfaces of these fine metal particles with a coupling agent or a synthetic resin.
- Although why any flowing of the decoration or the like can be prevented by the method of the present invention has yet to be clarified, a possible explanation could be that in the metal surface coated with the coupling agent or synthetic resin, the affinity of the metal surface for the binder in the ink is so enhanced that the metal surface is less susceptible to influences by a flow of the synthetic resin melt injected during injection molding.
- For the binder used with the picture applying ink according to the present invention, it is preferable to use polycarbonate resins of high heat resistance. For instance, it is acceptable to make use of generally known polycarbonate resins as well as aromatic polycarbonate resins modified by copolymers comprising 2,2-bis(4-hydroxyphenyl)propane units and 2,2-bis(4-hydroxy-3-methylphenyl)propane units or dialkylsiloxane units.
- To be more specific, Yupiron FPC2136 (copoly(2,2-bis(4-hydroxyphenyl)propane/2,2-bis(4-hydroxy-3-methylphenyl) propane) carbonate made by Mitsubishi Gas Chemical Company, Inc.), Z200 made by the same company, Panlight TS-2020 made by Teijin Limited, and high-heat-resistant thermoplastic resins set forth in Patent No. 2997636 are usable.
- For the aluminum particles coated with a synthetic resin or aluminum particles treated with a coupling agent, it is acceptable to use White Silver FZ-7160N, FZ-Q65, FZ-Q95 and 97-2515, all made by Toyo Aluminum Co., Ltd.
- The ink of the present invention may be produced by mixing these components with pigments and components generally added to inks, and milling the resultant mixture with the addition of an organic solvent thereto.
- As mentioned above, the ink of the present invention is produced by mixing the components together. Alternatively, the present ink may be produced by adding the metal particles treated with the synthetic resin or coupling agent to heat-resistant ink compositions commercially available for the formation of decorated sheets. For instance, it is acceptable to use NORIPHAN HTR (Proell Co., Ltd.) commercially available for the formation of decorated sheets.
- The decorated film or sheet produced by use of the ink according to the present invention may be formed by printing a given pattern on a substrate film such as a polycarbonate film by means of suitable processes such as screen printing.
- For the synthetic resin to be integrated with the decorated sheet of the present invention, it is acceptable to use polycarbonate resins, acrylonitrile·butadiene·styrene copolymers, and polymer alloys comprising polycarbonate resins/acrylonitrile·butadiene·styrene copolymers.
- The present invention is now explained with reference to some examples.
- Twenty (20) parts by weight of a polycarbonate resin (Yuprion FPC2136 made by Mitsubishi Gas Chemical Company, Inc.), 20 parts by weight of a paste of aluminum particles coated with a synthetic resin (FZ-7160N made by Toyo Aluminum Co., Ltd. with a particle diameter D50 of 13 µm), 1 part by weight of an anti-foaming agent (BYK-057 made by BYK-Chemie Japan Co., Ltd.), 20 parts by weight of a cyclohexanone solvent, 20 parts by weight of a propylene glycol monomethyl ether acetate solvent and 20 parts by weight of a Solvesso #150 solvent were mixed together, and the resultant mixture was then milled by a rotary mixer into an
ink 1. - Using
ink 1, a filled-in form of print pattern was formed by screen printing on a polycarbonate resin film of 150 mm x 70 mm in size and 500 µm in thickness. The printed film was dried at 100°C for 2 hours to prepare a decorated sheet. - The resultant decorated sheet was placed in a mold for injection molding. Then, a polymer alloy (Yupiron PM1210N made by Mitsubishi Gas Chemical Company, Inc.) comprising a polycarbonate/acrylonitrile·butadiene·styrene copolymer was fed from an injection molding machine with a cylinder temperature set at 250°C into the mold at 116 cm3/sec. to prepare an injection molded sample of 1.5 mm in thickness.
- In an injection molded
sample 1 shown in the plan view of Fig. 1, themaximum displacement distance 5 of an image-formed area from anend 4 of anarea 3 printed byink 1 on the decoratedsheet 2 was measured. In Table 1, this is referred to as the picture rolling amount. - The decorated sheet side of the injection molded sample was provided with an incision of 1 cm in width, at which the decorated sheet was peeled from the injection molded resin at a rate of pulling of 300 mm/min. to measure a 180° peel strength using a tensile tester.
- The picture rolling amount was measured as in Example 1A with the exception that a polycarbonate resin (Yupiron S-3000 made by Mitsubishi Gas Chemical Company, Inc.) for injection molding was fed at 116 cm3/sec. with a cylinder temperature of 305°C to prepare an injection molded sample of 1.9 mm in thickness. The thus measured decoration flowing amount and peel strength are shown in Table 2.
- An
ink 2 was prepared as in Example 1A with the exception that a paste of synthetic resin-coated aluminum particles (FZ-Q65 made by Toyo Aluminum Co., Ltd. with a particle diameter D50 of 20 µm) was used as the aluminum particles. - Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Injection molding was carried out following Example 1B with the exception that
ink 2 was used to prepare an injection molded sample. Then, the decoration flowing amount and peel strength were measured with the results shown in Table 2. - An
ink 3 was prepared as in Example 1A with the exception that a paste of aluminum particles surface-treated with a coupling agent (97-2515 made by Toyo Aluminum Co., Ltd. with a particle diameter D50 of 9 µm) was used as the aluminum particles. - Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Injection molding was carried out following Example 1B with the exception that
ink 3 was used to prepare an injection molded sample. Then, the decoration flowing amount and peel strength were measured with the results shown in Table 2. - An
ink 4 was prepared as in Example 1A with the exception that aluminum particles subjected to no surface treatment (TD280T made by Toyo Aluminum Co., Ltd. with a particle diameter D50 of 20 µm) was used as the aluminum particles. - Injection molding was carried out as in Example 1A to prepare an injection molded sample, and the decoration flowing amount and peel strength were thereafter measured with the results shown in Table 1.
- Injection molding was carried out following Example 1B with the exception that
ink 4 was used to prepare an injection molded sample. Then, the decoration flowing amount and peel strength were measured with the results shown in Table 2.Ex. 1A Ex. 2A Ex. 3A Comp. 1A Decoration Flowing Amount (mm) 1.07 1.02 1.10 4.22 Peel Strength (kN/m) 2.30 2.82 2.51 1.75 Ex. 1B Ex. 2B Ex. 3B Comp. 1B Decoration Flowing Amount (mm) 1.54 1.65 1.47 7.5 Peel Srength (kN/m) 2.98 2.96 2.94 1.44 - Molded articles obtained while the decorated film or sheet prepared using the ink of the present invention was placed in a mold for injection molding can be reduced in terms of the decoration flowing amount due to a flow of the synthetic resin during injection. Thus, the present invention enables molded article products to be produced in improved yields.
Claims (5)
- An ink used for printing of a preprinted film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, comprising:a binder comprising a polycarbonate resin, anda metal particle coated on the surface thereof with a coupling agent or a synthetic resin.
- The ink according to claim 1, wherein the metal particle is a flat form of aluminum particle.
- The ink according to claim 1, wherein the metal particle is a flat form of aluminum particle coated on its surface with an acrylic resin.
- A printed film or sheet used for decorating a molded article by integration with a synthetic resin melt at a synthetic resin molding step, which has been obtained by printing a synthetic resin film with an ink comprising a binder comprising a polycarbonate resin and a metal particle coated on the surface thereof with a coupling agent or a synthetic resin.
- A synthetic resin injection molding method wherein a printed film or sheet is prepared by printing using an ink containing a metal particle coated on the surface thereof with a coupling agent or a synthetic resin, the printed film or sheet is then placed in a metal mold, and a synthetic resin melt is finally subjected to injection molding at a temperature of 200°C or higher.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000104558 | 2000-04-06 | ||
JP2000104558A JP3422966B2 (en) | 2000-03-29 | 2000-04-06 | Ink and painting sheet for painting at the same time as molding |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1142970A1 true EP1142970A1 (en) | 2001-10-10 |
EP1142970B1 EP1142970B1 (en) | 2004-06-30 |
Family
ID=18618078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01107761A Expired - Lifetime EP1142970B1 (en) | 2000-04-06 | 2001-04-03 | Ink for applying a decoration on a molded article simultaneously with molding, and decorated film or sheet |
Country Status (6)
Country | Link |
---|---|
US (1) | US20010041249A1 (en) |
EP (1) | EP1142970B1 (en) |
KR (1) | KR100737361B1 (en) |
CN (1) | CN1237128C (en) |
DE (1) | DE60104044T2 (en) |
TW (1) | TW539728B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7687437B2 (en) | 2001-07-13 | 2010-03-30 | Nanosphere, Inc. | Method for immobilizing molecules onto surfaces |
JP4052647B2 (en) * | 2003-06-30 | 2008-02-27 | 帝国インキ製造株式会社 | Printing ink and decorative sheet using the same |
JP2009091383A (en) * | 2007-10-03 | 2009-04-30 | Seiko Epson Corp | Conductive pattern formation ink, conductive pattern and wiring substrate |
KR101191014B1 (en) * | 2009-12-17 | 2012-10-16 | (주)엘지하우시스 | Decoration Sheet with High Weather Resistance and Hair Line |
EP3466684B1 (en) * | 2016-06-02 | 2021-12-01 | Idemitsu Unitech Co., Ltd. | Laminate, molded body and method for producing molded body |
WO2021075551A1 (en) * | 2019-10-18 | 2021-04-22 | 本田技研工業株式会社 | Resin composition, resin molded article containing same, and method for manufacturing resin molded article |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS57140188A (en) * | 1981-02-25 | 1982-08-30 | Ricoh Co Ltd | Ink sheet |
US5648414A (en) * | 1994-06-20 | 1997-07-15 | Bayer Aktiengesellschaft | Screen printing ink containing polycarbonate binder |
DE19832570A1 (en) * | 1998-07-20 | 2000-02-17 | Mcgavigan John Ltd | High temperature resistant flexible printing dye for printing thin-walled, deep-drawn, decorated molded articles includes a binder including a thermoplastic polyester polyurethane |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806458A (en) * | 1972-09-28 | 1974-04-23 | Memorex Corp | Electrophotographic mixture comprising toner particles and coated carrier particles |
DE4030727A1 (en) * | 1990-09-28 | 1992-04-02 | Eckart Standard Bronzepulver | ARTICULATED METAL PIGMENTS, METHOD FOR THEIR PRODUCTION AND THEIR USE |
DE69825859T2 (en) * | 1998-01-13 | 2005-01-05 | Dainichiseika Color & Chemicals Mfg. Co., Ltd. | Ink jet recording sheet and method of making the sheet |
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2001
- 2001-03-09 KR KR1020010012292A patent/KR100737361B1/en active IP Right Grant
- 2001-03-12 US US09/803,011 patent/US20010041249A1/en not_active Abandoned
- 2001-03-19 TW TW090106315A patent/TW539728B/en not_active IP Right Cessation
- 2001-04-03 DE DE60104044T patent/DE60104044T2/en not_active Expired - Lifetime
- 2001-04-03 EP EP01107761A patent/EP1142970B1/en not_active Expired - Lifetime
- 2001-04-06 CN CNB011163356A patent/CN1237128C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57140188A (en) * | 1981-02-25 | 1982-08-30 | Ricoh Co Ltd | Ink sheet |
US5648414A (en) * | 1994-06-20 | 1997-07-15 | Bayer Aktiengesellschaft | Screen printing ink containing polycarbonate binder |
JP2997636B2 (en) * | 1994-06-20 | 2000-01-11 | バイエル・アクチエンゲゼルシヤフト | Heat resistant printing ink |
DE19832570A1 (en) * | 1998-07-20 | 2000-02-17 | Mcgavigan John Ltd | High temperature resistant flexible printing dye for printing thin-walled, deep-drawn, decorated molded articles includes a binder including a thermoplastic polyester polyurethane |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 006, no. 242 (M - 175) 30 November 1982 (1982-11-30) * |
Also Published As
Publication number | Publication date |
---|---|
US20010041249A1 (en) | 2001-11-15 |
EP1142970B1 (en) | 2004-06-30 |
DE60104044T2 (en) | 2004-10-28 |
KR100737361B1 (en) | 2007-07-09 |
CN1316471A (en) | 2001-10-10 |
TW539728B (en) | 2003-07-01 |
KR20010100813A (en) | 2001-11-14 |
DE60104044D1 (en) | 2004-08-05 |
CN1237128C (en) | 2006-01-18 |
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